ChromeOS: Disable ARC when incompatible filesystem is detected.

chrome/browser/chromeos/arc/arc_util.h

Index: chrome/browser/chromeos/arc/arc_util.h
diff --git a/chrome/browser/chromeos/arc/arc_util.h b/chrome/browser/chromeos/arc/arc_util.h
index 15559694da7db2b2e8c3edab12a1849fd58482f2..e3ea4895e16cee5b0b8bb0e714731091e1b39586 100644
--- a/chrome/browser/chromeos/arc/arc_util.h
+++ b/chrome/browser/chromeos/arc/arc_util.h
@@ -13,6 +13,10 @@
 
 class Profile;
 
+namespace base {
+class FilePath;
+}
+
 namespace arc {
 
 // Returns true if ARC is allowed to run for the given profile.
@@ -61,6 +65,10 @@ void SetArcPlayStoreEnabledForProfile(Profile* profile, bool enabled);
 // ArcBackupRestoreEnabled and ArcLocationServiceEnabled) are managed.
 bool AreArcAllOptInPreferencesManagedForProfile(const Profile* profile);
 
+// Returns whether ARC can run on the filesystem mounted at |path|.
+// This function should run only on threads where IO operations are allowed.
+bool IsArcCompatibleFilesystem(const base::FilePath& path);
+
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_UTIL_H_